US4109675A - Relief valve - Google Patents

Relief valve Download PDF

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Publication number
US4109675A
US4109675A US05/787,955 US78795577A US4109675A US 4109675 A US4109675 A US 4109675A US 78795577 A US78795577 A US 78795577A US 4109675 A US4109675 A US 4109675A
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US
United States
Prior art keywords
poppet
cylinder
barrel
flange
interior
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/787,955
Inventor
Ali Acar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ITT Inc
Original Assignee
International Telephone and Telegraph Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Telephone and Telegraph Corp filed Critical International Telephone and Telegraph Corp
Priority to US05/787,955 priority Critical patent/US4109675A/en
Application granted granted Critical
Publication of US4109675A publication Critical patent/US4109675A/en
Assigned to ITT CORPORATION reassignment ITT CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0426—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with seat protecting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0433—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with vibration preventing means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87917—Flow path with serial valves and/or closures
    • Y10T137/88038—One valve head carries other valve head

Definitions

  • This invention relates to high pressure valves, and more particularly to soft valves made of plastic or the like.
  • a fluid flow control device comprising: a barrel having a cylindrical internal surface; a hollow, cylindrical poppet guided for reciprocation inside said barrel, said barrel having an annular inwardly extending flange at one end thereof, said poppet having a closed end and an open end movable to abut said flange, said poppet being adapted to provide a path for fluid flow from inside thereof between said open end thereof and said flange, and around the exterior thereof but inside said barrel axially toward said closed end, said flange having a hole therethrough to allow fluid under pressure to enter said poppet through said flange hole, said poppet open end being larger than and adapted to close off said flange hole, said flange hole having a beveled interior surface; a cylinder slidable inside said poppet, said cylinder having an annular corner movable into and out of sealing engagement with said surface; an auxiliary spring mounted on said poppet to
  • FIGURE is a longitudinal sectional view of a valve constructed in accordance with the present invention.
  • FIG. 1 a barrel is shown at 10 having a flange 11.
  • a helically coiled spring is provided at 12 inside barrel 10.
  • a filter 13 is held against flange 11 by spring 12 through shims 14 and 15.
  • Spring 12 presses a nose portion 16 of a follower 17 against a frustoconical surface 18 of a poppet 19.
  • Poppet 19 has a cylindrical portion 20 which abuts a flange 21 of barrel 10.
  • a cylinder 22 is slidable inside poppet 19. Cylinder 22 has a annular corner 23 which bears against a beveled surface 24 of flange 21.
  • Barrel 10 has a pair of ears 24' with holes 25 therethrough.
  • Flange 21 has an annular recess 26 in which an O-ring 27 is located.
  • Cylinder 22 has an annular notch 28 in which another O-ring 29 is located.
  • a helically coiled spring 30 is provided which bears against the left interior surface of poppet 19 and against a projection 31 of cylinder 22. This provides a light force to cause corner 23 to seal against beveled surface 24.
  • pressure upon cylinder 22 is unbalanced in a direction to cause the unbalanced force thereon to provide a still tighter seal of corner 23 against beveled surface 24.
  • FIG. 1 The embodiment of the invention shown in FIG. 1 is a relief valve.
  • poppet 19 moves to the left, as viewed in FIG. 1, and ring 33 fixed to poppet 19 picks up cylinder 22 slidable therein, and lifts cylinder 22 so that corner 23 no longer engages beveled surface 24. Ring 33 and the surrounding structure thus form a lost motion connection.
  • openings of any sort are provided at 34 and 35 to allow a fluid entering barrel 10 in the direction of arrow 32 inside O-ring 27 to pass between flange 21 and cylinder 22 and flange 21 and poppet 19 through openings 34 and 35, and outwardly through shims 14 and 15, through filter 13 to the exterior of barrel 10.
  • sealing provided at corner 23 may be provided at high pressures, if desired.
  • a hard valve and seat are provided in the area of 36 at the end of poppet 19.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Abstract

A relief or other valve with a soft seal for sealing at high pressures. The seal is independently movable and at least partially pressure balanced for protection against seal damage and deformation. A hard seat is provided for engagement by a hard valve wherein a lost motion connection is provided between the seal and hard valve.

Description

BACKGROUND OF THE INVENTION
This invention relates to high pressure valves, and more particularly to soft valves made of plastic or the like.
In the past, soft valves have become damaged or deformed.
SUMMARY OF THE INVENTION
In accordance with the present invention, the above-described and other disadvantages of the prior art are overcome by providing a fluid flow control device, said device comprising: a barrel having a cylindrical internal surface; a hollow, cylindrical poppet guided for reciprocation inside said barrel, said barrel having an annular inwardly extending flange at one end thereof, said poppet having a closed end and an open end movable to abut said flange, said poppet being adapted to provide a path for fluid flow from inside thereof between said open end thereof and said flange, and around the exterior thereof but inside said barrel axially toward said closed end, said flange having a hole therethrough to allow fluid under pressure to enter said poppet through said flange hole, said poppet open end being larger than and adapted to close off said flange hole, said flange hole having a beveled interior surface; a cylinder slidable inside said poppet, said cylinder having an annular corner movable into and out of sealing engagement with said surface; an auxiliary spring mounted on said poppet to bias said corner against said surface, said cylinder having an unbalanced force radius at said corner somewhat less than that where said cylinder slides against the interior of said poppet; means to selectively hold said poppet open end in abutment with and spaced from said flange; and a lost motion connection between said poppet and said cylinder.
The above-described and other advantages of the present invention will be better understood from the following detailed description when considered in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings which are to be regarded as merely illustrative:
The FIGURE is a longitudinal sectional view of a valve constructed in accordance with the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In FIG. 1, a barrel is shown at 10 having a flange 11. A helically coiled spring is provided at 12 inside barrel 10. A filter 13 is held against flange 11 by spring 12 through shims 14 and 15.
Spring 12 presses a nose portion 16 of a follower 17 against a frustoconical surface 18 of a poppet 19. Poppet 19 has a cylindrical portion 20 which abuts a flange 21 of barrel 10. A cylinder 22 is slidable inside poppet 19. Cylinder 22 has a annular corner 23 which bears against a beveled surface 24 of flange 21.
Barrel 10 has a pair of ears 24' with holes 25 therethrough. Flange 21 has an annular recess 26 in which an O-ring 27 is located. Cylinder 22 has an annular notch 28 in which another O-ring 29 is located. A helically coiled spring 30 is provided which bears against the left interior surface of poppet 19 and against a projection 31 of cylinder 22. This provides a light force to cause corner 23 to seal against beveled surface 24. In addition, when pressure is provided in the direction of arrow 32, the pressure upon cylinder 22 is unbalanced in a direction to cause the unbalanced force thereon to provide a still tighter seal of corner 23 against beveled surface 24.
The embodiment of the invention shown in FIG. 1 is a relief valve. When the pressure in the direction of arrow 32 exceeds a predetermined value, poppet 19 moves to the left, as viewed in FIG. 1, and ring 33 fixed to poppet 19 picks up cylinder 22 slidable therein, and lifts cylinder 22 so that corner 23 no longer engages beveled surface 24. Ring 33 and the surrounding structure thus form a lost motion connection.
In FIG. 1, openings of any sort are provided at 34 and 35 to allow a fluid entering barrel 10 in the direction of arrow 32 inside O-ring 27 to pass between flange 21 and cylinder 22 and flange 21 and poppet 19 through openings 34 and 35, and outwardly through shims 14 and 15, through filter 13 to the exterior of barrel 10.
The fact that the spring 30 is light, the fact that cylinder 22 may be made of nylon or KEL-F or any soft material, makes it possible to obtain a tight seal at corner 23. However, in spite of the fact that a tight seal is so provided, the corner 23 is not damaged or deformed by moving into engagement with beveled surface 24. Still further, the slight unbalance of the forces on cylinder 22 provides a tight seal without causing the seal to be damaged at 23.
Note will be taken that the unbalance is caused because R2 is greater than R1.
In addition to the foregoing, the sealing provided at corner 23 may be provided at high pressures, if desired.
A hard valve and seat are provided in the area of 36 at the end of poppet 19.

Claims (8)

What is claimed is:
1. A fluid flow control device, said device comprising: a barrel having a cylindrical internal surface; a hollow, cylindrical poppet guided for reciprocation independent of rotation inside said barrel, said barrel having an annular inwardly extending flange at one end thereof, said poppet having a closed end and an open end movable to abut said flange, said poppet being adapted to provide a path for the fluid flow from inside thereof between said open end thereof and said flange, and around the exterior thereof but inside said barrel axially toward said closed end, said flange having a hole therethrough to allow fluid under pressure to enter said poppet through said flange hole, said poppet open end being larger than and adapted to close off said flange hole, said flange hole having a beveled interior surface; a cylinder slidable inside said poppet, said cylinder having an annular corner movable into and out of sealing engagement with said surface; an auxiliary spring mounted on said poppet to bias said corner against said surface, said cylinder having an unbalanced force radius at said corner somewhat less than that where said cylinder slides against the interior of said poppet; spring means to bias said poppet open end into abutment with said flange; and a lost motion connection between said poppet and said cylinder.
2. The invention as defined in claim 1, wherein said spring means includes a main spring stronger than said auxiliary spring.
3. The invention as defined in claim 2, wherein the space between said poppet and the interior of said barrel is vented through said barrel to the atmosphere.
4. The invention as defined in claim 3, wherein said cylinder is made of a sealing material softer than that of said poppet.
5. The invention as defined in claim 4, wherein a ring seal is compressed between said cylinder and the interior of said poppet.
6. The invention as defined in claim 1, wherein the space between said poppet and the interior of said barrel is vented through said barrel to the atmosphere.
7. The invention as defined in claim 1, wherein said cylinder is made of a sealing material softer than that of said poppet.
8. The invention as defined in claim 1, wherein a ring seal is compressed between said cylinder and the interior of said poppet.
US05/787,955 1977-04-15 1977-04-15 Relief valve Expired - Lifetime US4109675A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/787,955 US4109675A (en) 1977-04-15 1977-04-15 Relief valve

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Application Number Priority Date Filing Date Title
US05/787,955 US4109675A (en) 1977-04-15 1977-04-15 Relief valve

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US4109675A true US4109675A (en) 1978-08-29

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990007665A1 (en) * 1988-12-29 1990-07-12 Teledyne Industries, Inc. Cartridge-type direct loaded safety and pressure relief valve having flow path for preventing supersonic flow and minimizing valve hysteresis
US5186198A (en) * 1991-12-12 1993-02-16 Penn Troy Maching Company, Inc. Intake manifold relief valve
AU766164B2 (en) * 1998-07-28 2003-10-09 Mercer Technologies Limited A pressure relief valve
US20160176285A1 (en) * 2013-08-05 2016-06-23 Eaton Corporation Fuel tank check valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1163658A (en) * 1956-12-28 1958-09-30 Improvements to float valves and others
US3321177A (en) * 1964-08-06 1967-05-23 Specialties Dev Corp Valve for fluid medium under pressure
DE1909972A1 (en) * 1968-03-02 1969-09-25 Umberto Tomiati Stop valve unit, especially for taps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1163658A (en) * 1956-12-28 1958-09-30 Improvements to float valves and others
US3321177A (en) * 1964-08-06 1967-05-23 Specialties Dev Corp Valve for fluid medium under pressure
DE1909972A1 (en) * 1968-03-02 1969-09-25 Umberto Tomiati Stop valve unit, especially for taps

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990007665A1 (en) * 1988-12-29 1990-07-12 Teledyne Industries, Inc. Cartridge-type direct loaded safety and pressure relief valve having flow path for preventing supersonic flow and minimizing valve hysteresis
US4979540A (en) * 1988-12-29 1990-12-25 Teledyne Industries, Inc. Cartridge-type direct loaded safety and pressure-relief valve having flow path for preventing supersonic flow and minimizing valve hysteresis
US5186198A (en) * 1991-12-12 1993-02-16 Penn Troy Maching Company, Inc. Intake manifold relief valve
AU766164B2 (en) * 1998-07-28 2003-10-09 Mercer Technologies Limited A pressure relief valve
US20160176285A1 (en) * 2013-08-05 2016-06-23 Eaton Corporation Fuel tank check valve
US9914353B2 (en) * 2013-08-05 2018-03-13 Eaton Corporation Fuel tank check valve

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Owner name: ITT CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION;REEL/FRAME:004389/0606

Effective date: 19831122